It hurts. It hurts so much. It -- it chases its tail around until the cape appears, and then it yells 'Ruff, ruff, and away!' and goes flying into a badly-drawn sky. I used to love Cartoon Network. Used to. I don't think I can ever forgive them for this.
http://www.cartoonnetwork.com/tv_shows/krypto/index.html
http://www.tvtome.com/tvtome/servlet/ShowMainServlet/showid-27664/
Their tagline? 'Heroes unleashed.' Ace the Bathound is a frequent guest star. They fight the pets of villains. There's apparently an episode where Krypto's tail comes off and goes on a spree: it's called 'The Living End'.
Someone has to pay for this. Why does it have to be the viewers?